PP-Glass adhesion improvement by in-situ polymerization

M.ETCHEVERRY; M. L FERREIRA; S. E. BARBOSA; D. DAMIANI; N. CAPIATI

Rio de Janeiro

Congreso; World Polymer Congress MACRO 2006/ 41st International Symposium on Macromolecules; 2006

PP-glass adhesion is a problem to solve in the glass fibers reinforced thermoplastic composites. In this work, the adhesion improvement by chemical linking of PP with glass is proposed. It deals of novel glass surface pretreatment and subsequent metallocenic propylene polymerization onto it. Experimental results are presented on propylene-a- olefin graft copolymerization catalyzed by EtInd2ZrCl2/MAO. This is actually a copolymer formed by polypropylene and a hydroxy a-olefin grafted on MAO-pretreated glass slide. SEM and microscopic characterization confirm the permanence of a chemically bonded polymer even after a severe solvent extraction of the polymer physically bonded. From these results, the copolymerization of hydroxy a -olefin, grafted on MAO-pretreated glass slide, is foreseen as a possible way to graft polymers onto inorganic solids. The best pretreatment includes a step of contact with HF/NH4F buffered solution, a washing step and a final contact with KOH. This combination seems to produce the adequate OH concentration at the glass surface to fix MAO first and after the hydroxy a-olefin to copolymerize with propylene. ZrCl2/MAO. This is actually a copolymer formed by polypropylene and a hydroxy a-olefin grafted on MAO-pretreated glass slide. SEM and microscopic characterization confirm the permanence of a chemically bonded polymer even after a severe solvent extraction of the polymer physically bonded. From these results, the copolymerization of hydroxy a -olefin, grafted on MAO-pretreated glass slide, is foreseen as a possible way to graft polymers onto inorganic solids. The best pretreatment includes a step of contact with HF/NH4F buffered solution, a washing step and a final contact with KOH. This combination seems to produce the adequate OH concentration at the glass surface to fix MAO first and after the hydroxy a-olefin to copolymerize with propylene. a-olefin grafted on MAO-pretreated glass slide. SEM and microscopic characterization confirm the permanence of a chemically bonded polymer even after a severe solvent extraction of the polymer physically bonded. From these results, the copolymerization of hydroxy a -olefin, grafted on MAO-pretreated glass slide, is foreseen as a possible way to graft polymers onto inorganic solids. The best pretreatment includes a step of contact with HF/NH4F buffered solution, a washing step and a final contact with KOH. This combination seems to produce the adequate OH concentration at the glass surface to fix MAO first and after the hydroxy a-olefin to copolymerize with propylene. a -olefin, grafted on MAO-pretreated glass slide, is foreseen as a possible way to graft polymers onto inorganic solids. The best pretreatment includes a step of contact with HF/NH4F buffered solution, a washing step and a final contact with KOH. This combination seems to produce the adequate OH concentration at the glass surface to fix MAO first and after the hydroxy a-olefin to copolymerize with propylene. buffered solution, a washing step and a final contact with KOH. This combination seems to produce the adequate OH concentration at the glass surface to fix MAO first and after the hydroxy a-olefin to copolymerize with propylene. a-olefin to copolymerize with propylene.